package com.atguigu.gulimall.cart.controller;

import com.atguigu.common.utils.R;
import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {

    @Autowired
    CartService cartService;

    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItems(){
        List<CartItem> cartItems = cartService.getUserCartItems();
        return cartItems;
    }
    /**
     * 浏览器里有一个cookies:user-key:表示用户身份,一个月后过期
     * 如果第一次使用京东的购物车功能,都会给一个临时的用户身份
     * 浏览器以后保存,浏览器每次访问都会带上这个cookie
     *
     * 登录:session中有
     * 没登录:按照cookeie里面带来的user-key来做
     * 第一次:如果没有临时用户,帮忙创建一个临时用户
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
        Cart cart = cartService.getCart();
        model.addAttribute("cart",cart);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     * 利用RedirectAttributes重定向时添加要传递的数据
     * redirectAttributes.addAttribute将数据放到url的网络链接中
     * redirectAttributes.addFlashAttribute将数据放到session中,只能读一次
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes redirectAttributes) throws ExecutionException, InterruptedException {

         cartService.addToCart(skuId,num);
         //利用重定向防止无限制向购物车中添加数据,

        redirectAttributes.addAttribute("skuId",skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessfPage(@RequestParam("skuId") Long skuId,Model model){
        //重定向成功页面,再次查询购物车的数据即可
        CartItem cartItem = cartService.getCartItem(skuId);
        model.addAttribute("item",cartItem);
        return "success";
    }

    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("check") Integer checkNum){
        cartService.checkItem(skuId,checkNum);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer changeNum){
        cartService.countItem(skuId,changeNum);
        return "redirect:http://cart.gulimall.com/cart.html";
    }
    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId){
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }
}
